Si@SnS2–Reduced Graphene Oxide Composite Anodes for High‐Capacity Lithium‐Ion Batteries

Jinyan Dai; Jiang Liao; Minyi He; MengMeng Yang; Kaipeng Wu; Weitang Yao

doi:10.1002/cssc.201902839

journal article Nov 13, 2019

Si@SnS2–Reduced Graphene Oxide Composite Anodes for High‐Capacity Lithium‐Ion Batteries

Jinyan Dai Jiang Liao Minyi He MengMeng Yang

Kaipeng Wu

Weitang Yao

ChemSusChem Vol. 12 No. 23 pp. 5092-5098 · Wiley

View at Publisher Save 10.1002/cssc.201902839

Abstract

AbstractOne of the key challenges for the development of lithium‐ion batteries is the preparation of high‐performance anode materials. In this paper, a micro/nanostructured Si@SnS2‐rGO composite is reported in which Si nanoparticles with a particle size of 30 nm are electrostatically anchored on a 3D reduced graphene oxide (rGO) network and mixed with SnS2. The step‐wise lithiation/delithiation of SnS2 provided space‐constraining effects to accommodate volume expansion and particle aggregation, thereby alleviating the volume expansion of Si during cycling as well as enhancing the structural stability, whereas the rGO in the 3D network stabilized the composite. The composite had a high specific capacity of 1480.1 mAh g−1 after 200 cycles at a current density of 200 mA g−1 and a high stability at rates of 200–3000 mA g−1. The capacity attenuation after cycling was only 89.18 %. A stable specific capacity (425.5 mAh g−1) was achieved after 600 cycles at a current density of 3000 mA g−1. Therefore, the micro/nanostructured Si@SnS2‐rGO composite is a promising anode material for use in lithium‐ion batteries.

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Metrics

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Citations

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References

Details

Published: Nov 13, 2019
Vol/Issue: 12(23)
Pages: 5092-5098
License: View

Authors

J

Jinyan Dai